Collins Chiemeke

Federal University, Otuoke | FUOTUOKE · Department of Physics

Most often, if the direction and rate of heat flow is not well established, it becomes very difficult to design an effective mechanism that will channel heat away from a buried pipeline and an electrical cable, or dissipate direct heat from the Sun intensity. This research work therefore, is aimed at studying the direction and rate of internal and...

This research was carried out with the aim of using digitized topography information to study the natural drainage pattern that will in the long run assist in the design of a workable drainage system. The research was engendered by the incessant flood experience by Bayelsa state on a yearly basis and the urge to curb the menace impose by the flood....

This research work was carried out with the aim of using average shear wave velocity of the top 30 m (Vs30), technique to categorize the soil, and ascertain the probable resistance or damage that the structure placed on it could suffer in the event of damaging earthquake. In a bid to achieve this, downhole seismic survey was carried out in eight bo...

Thermal resistivity or conductivity is a measure of the ability of soil material to conduct or dissipate heat from the source to the environment. Different soil types are characterized with their diverse thermal resistivity and conductivity values, which also indicate its ability to dissipate heat generated by a pipeline or electrical cable. The ra...

Thermal resistivity survey was recently carried out with the aim of ascertaining its response to different lithologies, degree of soil water content, and ambient soil temperature within a specified location. The methodology employed in the determination of soil thermal resistivity and soil water content involves measuring the rate of temperature ch...

The essence of carrying out thermal resistivity survey is to measure the capacity of the ground to conduct or dissipate heat. However, most often, soil thermal resistivity are determined at a point or along straight line, where an electrical cable or a pipeline is to be laid; information regarding the thermal resistivity distribution of the adjoini...

It has been established that ambient soil temperature influences the results of thermal resistivity survey measured at the same point, using the same equipment. Hence, the need to investigate how ambient soil temperature and atmospheric temperature varies with time is of utmost necessity. To achieve this, the temperature of a specific point in the...

Comprehensive knowledge of soil thermal resistivity is important for the design and installation of buried pipeline and cables, as build up of heat within the vicinity of the buried pipeline could cause it to crack and rust, or the cable becomes overheated and melts. Hence, the aim of this research work is to examine the effect of soil ambient temp...

Though major earthquake of large magnitude has not occurred in Nigeria from previous records, however, the incessant earth tremor currently being experienced within the central northern Nigeria basement complex whose cause is yet to be ascertained calls for concern. Hence, the need for site seismological evaluation and characterization becomes para...

Downhole seismic survey stands as one of the best method for determining the velocity distribution within different lithological unit, and to infer the different lithology within these layers. The aim of this research work is to make use of downhole seismic method for site characterization, determination of velocity distribution and establishment o...

1 Geo-electric and seismic refraction tomography were carried out to investigate the depth to basement complex in a confined area where there are serious limitations in spread length as a result of obstacles. The major instruments used for this survey where Terraloc Mark6 digital seismograph, sets of vertical geophones, SAS 4000 Terrameter and Elec...

Multichannel analysis of surface waves (MASW) is widely used for the measurement of shear wave velocity and for geotechnical characterization of near surface material. It is also used for the evaluation of material properties, and material boundaries to identify different lithological units. Multichannel analysis of surface waves (MASW) was recentl...

The aim of this research work is to evaluate the velocities distribution and lithological changes within the subsurface, necessary for site characterization at a construction site located in the oil rich Niger Delta of Southern Nigeria using downhole seismic method. The downhole seismic survey was carried out with an offset distance of 3 m, at an i...

The relationship between the direction of flow of surface and underground water has not been well established. Knowledge of this relationship is very necessary to determine how underground aquifers are formed. The aim of this work is to Examine and establish the relationship between the direction of flow of surface and underground water. The questi...

The relationship between the direction of flow of surface and underground water has not been well established. Knowledge of this relationship is very necessary to determine how underground aquifers are formed. The aim of this work is to Examine and establish the relationship between the direction of flow of surface and underground water. The questi...

Although the surface wave can serve a very useful purpose if adequately utilized to infer near surface information making use of the Multichannel Analysis of Surface Wave (MASW), it can also constitute serious menace to the entire body wave seismic data during acquisition and processing, if there is no deliberate plan to remove it during data acqui...

The workshop is all about the application of already established principles of Geophysics.

Structural failure of office complex floor has recently occurred in isolated places at different time within the offices of Federal University Otuoke. Speculation off the possible causes has been attributed to poor construction work, while others have associated it to the underlying geology; a few attributed the cause to the recent earth tremors th...

The need to evaluate and understand the natural drainage pattern in a flood prone, and fast developing environment is of paramount importance. This information will go a long way to help the town planners to determine the drainage pattern, road networks and areas where prominent structures are to be located. This research work was carried out with...

The structural complexity within the basement complex of Zaria batholith makes refraction survey and interpretation a very difficult task. Assignment of picked travel time into different layers which is critical for refraction tomography inversion is almost impossible, because it is very difficult to determine when the refraction event becomes the...

High resolution seismic method has recently been carried out in Otuoke and Its Environs with the aim of investigating the near surface geological structure and the determination of the lithology which is very crucial for infrastructural development. To achieve this, seismic tomography was used for the survey. The results revealed that, the thicknes...

High resolution seismic method has recently been carried out in Otuoke and Its Environs with the aim of investigating the near surface geological structure and the determination of the lithology which is very crucial for infrastructural development. To achieve this, seismic tomography was used for the survey. The results revealed that, the thicknes...

The relationship between p wave and s wave is dynamic, and it is majorly a function of terrain. Knowing the relationship between p wave and s waves for any particular terrain is of vital important for both seismic exploration and geotechnical analysis. The aim of this research work is to establish an absolute relationship between the p waves and s...

The aim of this research work is to examine the extent to which joint inversion of Multichannel Analysis of Surface Wave (MASW) and High Resolution Seismic Reflection, could be used to delineate near surface structures and generate the very near surface velocity model, that is crucial for effective processing of reflection seismic data, using the s...

Tomography is an imaging technique that makes use of a non destructive energy source to probe the sub surface and produce a tomogram which represents a model of the geologic structure that exists below the surface. The principles of tomography initially were applied in the medical field and in the recent times applied in global and exploration geop...

This paper centers on the MASW. A process of making the surface wave previously considered as noise, very useful tool in delineating the near surface.

Geoelectric soundings using the symmetric Schlumberger configuration were carried out to investigate the groundwater potential in fifteen communities of Kajuru local government area within the Northern Nigerian Basement Complex. The project employed the acquired vertical electrical soundings (VES) data and hydrogeophysical expression of structural...

Regional and local flooding have always been a menace in Bayelsa state, this could well be attributed to poor knowledge and design of drainage system and erection of illegal structure across the water way. The aim of this study therefore, is to ascertain the natural drainage pattern that exit at Federal University Otuoke and its environs by taking...

Geoelectric soundings using the symmetric Schlumberger configuration were carried out to investigate the groundwater potential in fifteen communities of Kajuru local government area within the Northern Nigerian Basement Complex. The project employed the acquired vertical electrical soundings (VES) data and hydrogeophysical expression of structural...

This book on High Resolution 2D and 3D seismic reflection touches on the fundamentals of high resolution seismic reflection in the area of data acquisition, processing and interpretation. It is a book written out of field experience, with practical examples that will guide young seismologist who want to build career on seismology. The preliminary t...

The study area is Zaria, located in the basement complex of northern Nigeria. The rock type forming the major part of the Zaria batholith is granite. This research work was carried out to compare the responses of seismic refraction tomography and resistivity tomography in the same geologic environment and under the same conditions. Hence, the choic...

Multichannel Analysis of Surface Wave (MASW) seismic method is widely used in geotechnical engineering for the measurement of shear wave velocity and evaluation of material property. This method was recently conducted at a Dam site located in Zaria, within the basement complex of northern Nigeria. The aim of this experiment was to make use of the M...

High resolution seismic reflection has recently been carried out on Zaria batholith, with the aim of characterizing the granitic Zaria batholiths in terms of its lithology. The geology of the area has revealed that the older granite outcrops in the vicinity of Zaria are exposures of a syntectonics to late-tectonic granite batholiths which intruded...

The need to evaluate and understand the natural drainage pattern in a flood prone, and fast developing environment is of paramount importance. This information will go a long way to help the town planners to determine the drainage pattern, road networks and areas where prominent structures are to be located. This research work was carried out with...

The type of method adopted for this research was the 1D electrical resistivity, using the GEOPULSE Tarrameter. A schlumberger configuration was carried out to map out the Geological features of the earth subsurface. Five profiles were carried out in the study area. Each profile, the layout geometry for the electrical resistivity were the normal sch...

In exploration and engineering seismology, ground roll has been treated as the most troublesome noise, masking the useful body waves during data acquisition and processing. Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delinea...

This research work was carried out to determine the extent to which a geophysical data could give similar results (anomalies) when reprocessed under the same condition. Hence seismic refraction tomography processing which depends on picked arrival times was carried out to ascertain this fact. Two different raw seismic data collected from two profil...

A geophysical study was carried out using Electrical resistivity method to delineated the boundary between basement complex and sedimentary rocks in kakara village, kano state. This area marks a contact zone between basement complex of northern Nigeria and sedimentary rock of chad basin formation. Twenty four Vertical Electric Soundings (VES) ware...

Zaria, where this Survey was carried out is located in the basement complex of North Central Nigeria. It consists of Precambrian rocks types made up of granite, gneisses and low grade metasediment. The gneiss and the low grade metasediment forms the country rock into which the granitic batholith intruded. This work is meant to examine the effective...

Resistivity Tomography (Imaging) was carried out across failed boreholes to ascertain the causes of the failure, which before drilling were initially investigated using vertical electrical sounding (VES). Wenner Schlumberger method which has very good vertical and horizontal resolution was employed for the survey. In each case an electrode spacing...

This research work was carried out to determine the extent to which a geophysical data could give similar results (anomalies) when reprocessed under the same condition. Hence seismic refraction tomography processing which depends on picked arrival times was carried out to ascertain this fact. The processing flow started from importing raw seismic d...

Leachate plumes emanating from an old municipal waste disposal sites near residential quarters of Hayin dogo in the Samaru area of Zaria is suspected to be contaminating domestic wells in the vicinity. Remedial work of groundwater quality needs to understand the geological conditions. The seismic refraction tomography survey provides the solution t...

Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delineate the very near surface structure and for proper static correction of reflection seismic data. This research was carried out with a bid to developing a technique that could...

High resolution seismic reflection survey has recently been carried in Zaria, located in the basement complex of northern Nigeria. The geology of Zaria revealed that it is made up of Precambrian rocks that consist of granite that form the major part of the batholiths along with low grade meta-sediments and gneisses that constitute the country rock...

The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...

Shallow Seismic reflection survey was carried out in Zaria, located in the basement complex of central northern Nigeria, with the aim of characterising the granitic batholith. However, the effect of near surface material, which could make reflection events appear disjointed or deeper than they really are, could be enormous if not corrected for. Thi...

2D Electrical Resistivity imaging survey was carried out at the Old Cemetery and Tsamiya waste disposal sites in Zaria metropolis over a period of ten months with a view to monitoring the migration of leachate plumes within the subsurface. The Abem Lund Imaging system with Terrameter SAS 4000 was used for the data acquisition and processing while t...

Near surface high resolution 2-D seismic reflection survey was carried out along the Zaria batholith. Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneiss and Low-grade metasediments. The granitic Zaria batholith intruded the gneiss and metasediments which fo...

The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...

Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneisses and low grade meta-sediment. High resolution seismic reflection survey has recently been carried out in Zaria, to determine the AVO characteristic of the granitic batholith and the country rocks into whic...

Seismic refraction is mostly used in geotechnical work to determine the velocity of the overburden and the refractor velocity. Roll along, in seismic refraction tomography, is important for three reasons. These are to increase the profile length beyond the distance dictated by the source and the instrument (number of receiver and cable length), to...

The mining industry has traditionally used geologic field mapping, electromagnetic and potential field techniques, and drilling to explore for new mineral deposits, but with new discoveries of large near-surface deposits becoming increasingly rare and the known reserves of most economic minerals in decline, it is clear that new deep exploration tec...

High resolution seismic reflection survey has recently been carried in Zaria, located in the basement complex of northern Nigeria. The geology of Zaria revealed that it is made up of Precambrian rocks that consist of granite that form the major part of the batholiths along with low grade meta-sediments and gneisses that constitute the country rock...

3D seismic reflection survey was recently carried out within the Zaria area of the basement complex of northern Nigeria, in order to investigate the complexity of the subsurface features within the basement. The geology of the survey area was characterized by gneisses and low grade meta-sedimentary rocks that form the country rock into which the gr...

Seismic refraction tomography is unique in the sense that shot are taken at every receiver position along the spread. In that way, it becomes possible to conduct both forward and reverse shooting simultaneously along the profile. Furthermore, every point within the subsurface along the profile is probed by both forward and reversed shots. This lead...

Geo-electric and seismic refraction tomography were carried out to investigate the depth to basement complex in a confined area where there are serious limitations in spread length as a result of obstacles. The major instruments used for this survey where Terraloc Mark6 digital seismograph, sets of vertical geophones, SAS 4000 Terrameter and Electr...

Zaria area forms part of the Precambrian basement complex of north central Nigeria which comprises Precambrian rocks made up of granite, gneisse and migmatite, with very thin overburden cover. The common depth point (CDP) seismic reflection method was employed for this survey. The receivers (geophones) were placed in a straight line at 1 m interval...

Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. This technique was used to estimate the depth to the fresh basement, estimate thickness of the weathered basement and to determine the subsurface lithology within the Bas...

Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. This technique was used to estimate the depth to the fresh basement, estimate thickness of the weathered basement and to determine the subsurface lithology within the Bas...

Tomography is an imaging technique which generates a cross-sectional picture (a tomogram) of an object by utilizing the object’s response to the non destructive, probing energy of external sources. Seismic tomography makes use of the sources that generate seismic waves which probe a geological target of interest. The output of seismic tomography an...

Seismic refraction tomography involves the measurement of the travel times of seismic refracted raypaths in order to define an image of seismic velocity in the intervening ground. Measurement of arrival times for each shot, at each receiver position, results in a network of overlapping raypaths which can then be used to model the velocity profile....

Refraction tomography relies on the travel times of seismic energy recorded at the surface by multiple receivers from many sources to generate an optimized model of the distribution of seismic velocities in the subsurface. This velocity model can be used to map subsurface features having sufficient differences in elastic properties. The methodology...

A moderate earthquake of magnitude MS=5.9 occurred on 7 September 1999 south of the mountain Parnitha, in the vicinity of the city of Athens. During the analysis of the aftershocks, that were recorded and located by a temporary network installed by the University of Athens, the existence of shear-wave splitting was revealed and attributed to the pr...

Information within less than 50 ms of seismic reflection data are often masked by surface wave. These amplitude and velocity information within this region are needed to delineate the very near surface structure and for proper static correction of reflection seismic data. This research was carried out with a bid to developing a technique that could...

Zaria area forms part of the Precambrian basement complex of north central Nigeria, which comprises Precambrian rocks made up of granite, gneisses and low grade metasediment. High resolution seismic reflection survey was carried out in Zaria to determine the AVO characteristic of the granitic batholith and the country rocks into which the batholith...